ForShorts

Shoes that add 9 cm

44 of them, between 8.6 cm and 9.1 cm, because the makers do not all round the same way. Roughly 3½". The cheapest is $47.50 and the median is $150, which puts a centimetre at about $16.48.

Shoes
44
Exact lifts held
8.6 cm, 9 cm, 9.1 cm
Cheapest
$47.50
Median per cm
$16.48
What 9 cm looks like

Noticeable, and still wearable

Past 8 cm the sole has to get visibly deep, so the shape of the shoe starts doing the work. Boots and chunky sneakers carry it better than anything with a thin last.